calcite-fab with combobox not working together

[LefterisKoumis]

If I use dropdown I can use the button fab for a trigger, but not with the combobox. Is it a bug? 

I am trying to use the combobox in the same manner like the dropdown. 

https://codepen.io/lkoumis1/pen/zYyOrLb?editors=1100

[KittyHurley · Accepted solution]

Dropdown has a trigger slot to support floating lists, however Combobox does not as it is intended as an input and dropdown-based selection, which allows for quick filtering of single and multi-selections.

This is where the two components differ in design intent, mentioned in the Dropdown Groups single selection thread earlier this week.

[LefterisKoumis]

I guess we can't have the best of both components (dropdown and combobox). Dropdown does not support multiple groups with one selection (llink ) and Combobox doesn't support trigger slot.